To get centum in Bio-Zoology separate as a column for one mark questions based on diseases, scientist name, years, abbreviations and parameters. For 3 mark questions concentrate on chapter microbiology, modern genetics, applied biology , environmental science and theories of evolution. For 5 mark immunology, microbiology or theories of evolution. For 10 mark you can be thorough on human physiology part 1 (Nutrition to circulatory system) or human physiology part 2 (Nervous system to reproductive system) and applied biology. Mostly biology questions will be based on awareness of health, awareness of diseases and knowledge about medical instruments. Presentation of answers - don't give paragraph answers for 10 marks and 3 marks instead of that give it as points. Diagram - in pencil even for marking. For choose write the correct choice and answer. Hope these tips may increase your confidence level to get centum in bio-zoology